1921142 has 8 divisors (see below), whose sum is σ = 2888256. Its totient is φ = 958392.

The previous prime is 1921133. The next prime is 1921159. The reversal of 1921142 is 2411291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443 + ... + 2009.

It is an arithmetic number, because the mean of its divisors is an integer number (361032).

2^1921142 is an apocalyptic number.

1921142 is a deficient number, since it is larger than the sum of its proper divisors (967114).

1921142 is a wasteful number, since it uses less digits than its factorization.

1921142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

The product of its digits is 144, while the sum is 20.

The square root of 1921142 is about 1386.0526685520. The cubic root of 1921142 is about 124.3139374341.

The spelling of 1921142 in words is "one million, nine hundred twenty-one thousand, one hundred forty-two".